[Bug tree-optimization/113119] ICE: verify_ssa failed: definition in block 18 does not dominate use in block 4 at -O1 with _BitInt

["zsojka at seznam dot cz" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113119

--- Comment #2 from Zdenek Sojka <zsojka at seznam dot cz> ---
Created attachment 56925
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=56925&action=edit
slightly less reduced testcase, ICEing elsewhere

The original testcase was ICEing at a different place, as does this testcase:

$ x86_64-pc-linux-gnu-gcc -O testcase.c 
during GIMPLE pass: bitintlower
testcase.c: In function 'foo':
testcase.c:8:1: internal compiler error: in operator[], at vec.h:910
    8 | foo(_BitInt(4058) d)
      | ^~~
0x8a0a88 vec<tree_node*, va_gc, vl_embed>::operator[](unsigned int)
        /repo/gcc-trunk/gcc/vec.h:910
0x8a0c6e vec<equiv_chain*, va_heap, vl_embed>::operator[](unsigned int)
        /repo/gcc-trunk/gcc/value-relation.cc:736
0x8a0c6e vec<equiv_chain*, va_heap, vl_ptr>::operator[](unsigned int)
        /repo/gcc-trunk/gcc/vec.h:1599
0x8a0c6e equiv_oracle::add_equiv_to_block(basic_block_def*, bitmap_head*)
        /repo/gcc-trunk/gcc/value-relation.cc:721
0x185e5c2 equiv_oracle::register_relation(basic_block_def*, relation_kind_t,
tree_node*, tree_node*)
        /repo/gcc-trunk/gcc/value-relation.cc:675
0x26597e9 fold_using_range::range_of_range_op(vrange&,
gimple_range_op_handler&, fur_source&)
        /repo/gcc-trunk/gcc/gimple-range-fold.cc:687
0x2659bf2 fold_using_range::fold_stmt(vrange&, gimple*, fur_source&,
tree_node*)
        /repo/gcc-trunk/gcc/gimple-range-fold.cc:602
0x2641c7e gimple_ranger::fold_range_internal(vrange&, gimple*, tree_node*)
        /repo/gcc-trunk/gcc/gimple-range.cc:265
0x2641c7e gimple_ranger::range_of_stmt(vrange&, gimple*, tree_node*)
        /repo/gcc-trunk/gcc/gimple-range.cc:326
0x264597a gimple_ranger::range_of_expr(vrange&, tree_node*, gimple*)
        /repo/gcc-trunk/gcc/gimple-range.cc:134
0x261e312 range_to_prec
        /repo/gcc-trunk/gcc/gimple-lower-bitint.cc:1980
0x2620acb handle_operand_addr
        /repo/gcc-trunk/gcc/gimple-lower-bitint.cc:2025
0x26217e7 lower_muldiv_stmt
        /repo/gcc-trunk/gcc/gimple-lower-bitint.cc:3365
0x2635599 gimple_lower_bitint
        /repo/gcc-trunk/gcc/gimple-lower-bitint.cc:6490
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